This paper presents screening results of suitable thermal insulation materials and a thermal insulation concept for an ultra-high temperature latent heat thermal energy store. A multi-layer insulation concept was determined as it reduces heat losses and costs of the thermal insulation compared to one-layer insulation. Simulation studies with the software COMSOL Multiphysics 5.2a were performed to investigate heat losses and temperature propagation dependent on the thermal insulation materials, the thickness of the insulation layers and the atmosphere gas. The TES was modeled as a truncated cone with a height of 150 mm and diameters of 100 and 150 mm with a constant temperature of 2 300 K. The application of vacuum in the thermal insulation was found to be very promising in order to reduce insulation thickness as well as heat losses and consequently costs. A two-layer insulation of graphite fiber mat and fumed silica board with a total thickness of 500 mm in vacuum atmosphere resulted in less than half of the total heat loss rate compared to the same two-layer insulation with a total thickness of 540 mm in argon atmosphere.
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8 November 2018
SolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems
26–29 September 2017
Santiago, Chile
Research Article|
November 08 2018
Thermal insulation of an ultra-high temperature thermal energy store for concentrated solar power
Stephan Lang;
Stephan Lang
a)
1
University of Stuttgart, Institute of Thermodynamics and Thermal Engineering (ITW), Research and Testing Centre for Thermal Solar Systems (TZS)
, Pfaffenwaldring 6, 70569 Stuttgart, Germany
, Phone: +49 711 685 63614a)Corresponding author: [email protected]
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Dominik Bestenlehner;
Dominik Bestenlehner
1
University of Stuttgart, Institute of Thermodynamics and Thermal Engineering (ITW), Research and Testing Centre for Thermal Solar Systems (TZS)
, Pfaffenwaldring 6, 70569 Stuttgart, Germany
, Phone: +49 711 685 63614
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Roman Marx;
Roman Marx
1
University of Stuttgart, Institute of Thermodynamics and Thermal Engineering (ITW), Research and Testing Centre for Thermal Solar Systems (TZS)
, Pfaffenwaldring 6, 70569 Stuttgart, Germany
, Phone: +49 711 685 63614
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Harald Drück
Harald Drück
1
University of Stuttgart, Institute of Thermodynamics and Thermal Engineering (ITW), Research and Testing Centre for Thermal Solar Systems (TZS)
, Pfaffenwaldring 6, 70569 Stuttgart, Germany
, Phone: +49 711 685 63614
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a)Corresponding author: [email protected]
AIP Conf. Proc. 2033, 090020 (2018)
Citation
Stephan Lang, Dominik Bestenlehner, Roman Marx, Harald Drück; Thermal insulation of an ultra-high temperature thermal energy store for concentrated solar power. AIP Conf. Proc. 8 November 2018; 2033 (1): 090020. https://doi.org/10.1063/1.5067114
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